Galena - Mid Continental Mine, Picher, Oklahoma, USA
 
Intact galena crystals with a wide variety of surface structures. The crystals with an edge length of up to 17 mm are partly smooth, interspersed with other crystals and at the same time partially dissolved and crystallized like a staircase. 
In addition to the versatility of the surface, the crystals present themselves in a highly aesthetic manner on mother rock.